IBM® SPSS® Amos™ 28

The fit measures, AIC, BCC, and BIC, are defined in Appendix C. Each measure is of the form , where k takes on the same value for all models. Small values are good, reflecting a combination of good fit to the data (small ) and parsimony (small q). The measures are used for comparing models to each other, and not for judging the merit of a single model.

Amos's specification search procedure provides three ways of rescaling these measures, which were illustrated in Examples 22 and 23. This Appendix provides formulas for the re-scaled fit measures.

In what follows, let AIC(i), BCC(i) , and BIC(i) be the fit values for model i.